source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS/Src/VariablesAndDPTs/CompatibleDPT.asm@ 575

Last change on this file since 575 was 568, checked in by krille_n_@…, 10 years ago

Changes:

  • SerDrive: Using named pipe mode (serdrive -p) now works under Windows XP/2000/Server 2003.
  • checksum.pl: Added a compatibility fix for 3Com 3C503 cards.
  • XTIDECFG will now scan every possible segment address to find and load the BIOS and/or its settings from EEPROM. This should simplify things for people using combined option ROMs.
  • Fixed a bug from r521 in BootSector.asm where the BIOS would not display a timeout error if it failed to load the boot sector from harddrive.
  • Fixed a bug from r541 in CompatibleDPT.asm where CompatibleDPT_CreateDeviceParameterTableExtensionToESBXfromDPTinDSSI would generate an invalid checksum in the DPTE.
  • Optimizations and other fixes.
File size: 9.7 KB
Line 
1; Project name : XTIDE Universal BIOS
2; Description : Functions to handle DPT structs to present drive geometry
3; to ill behaving applications that want
4; to read DPT from interrupt vectors 41h and 46h.
5
6;
7; XTIDE Universal BIOS and Associated Tools
8; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
9;
10; This program is free software; you can redistribute it and/or modify
11; it under the terms of the GNU General Public License as published by
12; the Free Software Foundation; either version 2 of the License, or
13; (at your option) any later version.
14;
15; This program is distributed in the hope that it will be useful,
16; but WITHOUT ANY WARRANTY; without even the implied warranty of
17; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18; GNU General Public License for more details.
19; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
20;
21
22; Section containing code
23SECTION .text
24
25;--------------------------------------------------------------------
26; CompatibleDPT_CreateToAXSIforDriveDL
27; Parameters:
28; DL: Drive number (80h or 81h)
29; DS:DI: Ptr to DPT
30; Returns:
31; AX:SI Ptr to destination buffer
32; Corrupts registers:
33; CX, DX
34;--------------------------------------------------------------------
35CompatibleDPT_CreateToAXSIforDriveDL:
36 push es
37
38 call AccessDPT_GetDeviceControlByteToAL
39 xchg cx, ax ; Device control byte to CL
40 mov si, di ; DPT now in DS:SI
41 call GetBufferForDrive80hToESDI
42 shr dx, 1
43 jnc SHORT .BufferLoadedToESDI
44 add di, BYTE TRANSLATED_DPT_size ; For drive 81h
45.BufferLoadedToESDI:
46
47 call FillToESDIusingDPTfromDSSI
48 xchg di, si
49 mov ax, es
50
51 pop es
52 ret
53
54
55;--------------------------------------------------------------------
56; GetTemporaryBufferForDPTEtoESDI
57; GetBufferForDrive80hToESDI
58; Parameters:
59; DS: RAMVARS segment
60; Returns:
61; ES:DI: Ptr to buffer (in RAMVARS segment)
62; Corrupts registers:
63; Nothing
64;--------------------------------------------------------------------
65%ifdef MODULE_EBIOS
66GetTemporaryBufferForDPTEtoESDI:
67 call GetBufferForDrive80hToESDI
68 add di, BYTE TRANSLATED_DPT_size * 2
69 ret
70%endif
71
72GetBufferForDrive80hToESDI:
73 push ds
74 pop es
75 mov di, [cs:ROMVARS.bStealSize] ; No harm to read WORD
76 eSHL_IM di, 10 ; DI = RAMVARS size in bytes
77%ifdef MODULE_EBIOS
78 sub di, BYTE (TRANSLATED_DPT_size * 2) + DPTE_size
79%else
80 sub di, BYTE TRANSLATED_DPT_size * 2
81%endif
82 ret
83
84
85;--------------------------------------------------------------------
86; FillToESDIusingDPTfromDSSI
87; Parameters:
88; CL: Device Control Byte
89; DS:SI: Ptr to DPT
90; ES:DI Ptr to destination buffer
91; Returns:
92; Nothing
93; Corrupts registers:
94; AX, CX, DX
95;--------------------------------------------------------------------
96FillToESDIusingDPTfromDSSI:
97 mov ax, [si+DPT.wLchsCylinders]
98 call AH8h_LimitAXtoMaximumLCylinders
99 test BYTE [si+DPT.bFlagsLow], MASKL_DPT_TRANSLATEMODE
100 jz SHORT FillStandardDPTtoESDIfromDPTinDSSI
101 ; Fall to FillTranslatedDPTtoESDIfromDPTinDSSI
102
103;--------------------------------------------------------------------
104; FillTranslatedDPTtoESDIfromDPTinDSSI
105; Parameters:
106; AX: Number of Logical Cylinders
107; CL: Device Control Byte
108; DS:SI: Ptr to DPT
109; ES:DI: Ptr to destination buffer
110; Returns:
111; Nothing
112; Corrupts registers:
113; AX, CX, DX
114;--------------------------------------------------------------------
115FillTranslatedDPTtoESDIfromDPTinDSSI:
116 cwd ; Clear for checksum
117 call StoswThenAddALandAHtoDL ; Bytes 0 and 1 (Logical number of cylinders)
118
119 mov al, [si+DPT.bLchsHeads]
120 mov ah, TRANSLATED_DPT_SIGNATURE
121 call StoswThenAddALandAHtoDL ; Bytes 2 (Logical number of heads) and 3 (Axh signature to indicate Translated DPT)
122
123 eMOVZX ax, [si+DPT.bPchsSectorsPerTrack]
124 call StoswThenAddALandAHtoDL ; Bytes 4 (Physical sectors per track) and 5 (Write Precompensation Cylinder low)
125
126 mov al, ah ; Zero AX
127 stosw ; Bytes 6 (Write Precompensation Cylinder high) and 7
128
129 xchg cx, ax ; Device Control byte to AL, zero to CX
130 mov ah, [si+DPT.wPchsCylinders]
131 call StoswThenAddALandAHtoDL ; Bytes 8 (Drive Control Byte) and 9 (Physical number of cylinders low)
132
133 mov al, [si+DPT.wPchsCylinders+1]
134 mov ah, [si+DPT.bPchsHeads]
135 call StoswThenAddALandAHtoDL ; Bytes 10 (Physical number of cylinders high) and 11 (Physical number of heads)
136
137 xchg cx, ax ; Zero to AX
138 stosw ; Bytes 12 and 13 (Landing Zone Cylinder)
139
140 mov al, [si+DPT.bLchsSectorsPerTrack]
141%ifndef USE_186
142 call StoswALandChecksumFromDL ; Bytes 14 (Logical sectors per track) and 15 (Checksum)
143 jmp SHORT FillStandardDPTtoESDIfromDPTinDSSI.RestoreOffsetsAndReturn
144%else
145 push FillStandardDPTtoESDIfromDPTinDSSI.RestoreOffsetsAndReturn
146 ; Fall to StoswALandChecksumFromDL
147%endif
148
149
150;--------------------------------------------------------------------
151; StoswALandChecksumFromDL
152; Parameters:
153; AL: Last byte to store before checksum byte
154; DL: Sum of bytes so far
155; ES:DI: Ptr to where to store AL and Checksum byte
156; Returns:
157; DL: Sum of bytes so far
158; DI: Incremented by 2
159; Corrupts registers:
160; AH
161;--------------------------------------------------------------------
162StoswALandChecksumFromDL:
163 mov ah, al
164 add ah, dl
165 neg ah
166 stosw
167 ret
168
169
170;--------------------------------------------------------------------
171; FillStandardDPTtoESDIfromDPTinDSSI
172; Parameters:
173; AX: Number of Physical Cylinders == Number of Logical Cylinders
174; CL: Device Control Byte
175; DS:SI: Ptr to DPT
176; ES:DI: Ptr to destination buffer
177; Returns:
178; Nothing
179; Corrupts registers:
180; AX
181;--------------------------------------------------------------------
182FillStandardDPTtoESDIfromDPTinDSSI:
183 stosw ; Bytes 0 and 1 (Physical number of cylinders)
184 eMOVZX ax, [si+DPT.bLchsHeads]
185 stosw ; Bytes 2 (Physical number of heads) and 3
186%ifdef USE_UNDOC_INTEL
187%ifdef USE_386
188 xor al, al ; Zero AX and clear CF
189%else
190 salc ; Zero AX (CF cleared by eMOVZX above)
191%endif
192%else
193 mov al, ah ; Zero AX
194%endif
195 stosw ; Bytes 4 and 5 (Write Precompensation Cylinder low)
196 stosw ; Bytes 6 (Write Precompensation Cylinder high) and 7
197 mov al, cl ; Device control byte to AL
198 stosw ; Bytes 8 (Drive Control Byte) and 9
199%ifdef USE_UNDOC_INTEL
200 salc ; Zero AX (CF cleared above)
201%else
202 mov al, ah ; Zero AX
203%endif
204 stosw ; Bytes 10 and 11
205 stosw ; Bytes 12 and 13 (Landing Zone Cylinder)
206 mov al, [si+DPT.bLchsSectorsPerTrack]
207 stosw ; Bytes 14 (Physical sectors per track) and 15
208
209.RestoreOffsetsAndReturn:
210 sub di, BYTE STANDARD_DPT_size
211 ret
212
213
214%ifdef MODULE_EBIOS
215;--------------------------------------------------------------------
216; CompatibleDPT_CreateDeviceParameterTableExtensionToESBXfromDPTinDSSI
217; Parameters:
218; DS:SI: Ptr to DPT (in RAMVARS segment)
219; Returns:
220; ES:BX: Ptr to Device Parameter Table Extension (DPTE)
221; Corrupts registers:
222; AX, CX, DL, DI
223;--------------------------------------------------------------------
224CompatibleDPT_CreateDeviceParameterTableExtensionToESBXfromDPTinDSSI:
225 call GetTemporaryBufferForDPTEtoESDI ; Valid until next AH=48h call
226
227 ; Set 32-bit flag for 32-bit controllers
228 mov cx, FLG_LBA_TRANSLATION_ENABLED ; DPTE.wFlags
229 cmp BYTE [si+DPT_ATA.bDevice], DEVICE_32BIT_ATA
230 eCMOVE cl, FLG_LBA_TRANSLATION_ENABLED | FLG_32BIT_XFER_MODE
231
232 xor dl, dl ; Clear DL for checksum
233
234 ; DPTE.wBasePort
235 mov ax, [si+DPT.wBasePort]
236 call StoswThenAddALandAHtoDL ; Bytes 0 and 1
237
238 ; DPTE.wControlBlockPort
239 eMOVZX bx, [si+DPT.bIdevarsOffset]
240 mov ax, [cs:bx+IDEVARS.wControlBlockPort]
241 call StoswThenAddALandAHtoDL ; Bytes 2 and 3
242
243 ; DPTE.bDrvnhead and DPTE.bBiosVendor
244 xchg di, si
245 call AccessDPT_GetDriveSelectByteToAL
246 xchg si, di
247 call StoswThenAddALandAHtoDL ; Bytes 4 and 5
248
249 ; DPTE.bIRQ and DPTE.bBlockSize
250 mov al, [cs:bx+IDEVARS.bIRQ] ; No way to define that we might not use IRQ
251 mov ah, [si+DPT_ATA.bBlockSize]
252 cmp ah, 1
253 jbe SHORT .DoNotSetBlockModeFlag
254 or cl, FLG_BLOCK_MODE_ENABLED
255.DoNotSetBlockModeFlag:
256 call StoswThenAddALandAHtoDL ; Bytes 6 and 7
257
258 ; DPTE.bDmaChannelAndType and DPTE.bPioMode
259 xor ax, ax
260%ifndef MODULE_ADVANCED_ATA
261 stosw ; Bytes 8 and 9
262%else
263 or ah, [si+DPT_ADVANCED_ATA.bPioMode]
264 jz SHORT .DoNotSetFastPioFlag
265 cmp WORD [si+DPT_ADVANCED_ATA.wControllerID], BYTE 1
266 sbb cl, -1 ; FLG_FAST_PIO_ENABLED (if .wControllerID > 0)
267.DoNotSetFastPioFlag:
268 call StoswThenAddALandAHtoDL ; Bytes 8 and 9
269%endif
270
271 ; Set CHS translation flags and store DPTE.wFlags
272 mov al, [si+DPT.bFlagsLow]
273 and al, MASKL_DPT_TRANSLATEMODE
274 jz SHORT .NoChsTranslationOrBitShiftTranslationSet
275 or cl, FLG_CHS_TRANSLATION_ENABLED
276 test al, FLGL_DPT_ASSISTED_LBA
277 jz SHORT .NoChsTranslationOrBitShiftTranslationSet
278 or ch, LBA_ASSISTED_TRANSLATION << (TRANSLATION_TYPE_FIELD_POSITION - 8)
279.NoChsTranslationOrBitShiftTranslationSet:
280 xchg ax, cx
281 call StoswThenAddALandAHtoDL ; Bytes 10 and 11
282
283 ; DPTE.wReserved (must be zero)
284 xor ax, ax
285 stosw ; Bytes 12 and 13
286
287 ; DPTE.bRevision and DPTE.bChecksum
288 mov al, DPTE_REVISION
289 lea bx, [di+2-DPTE_size] ; The +2 compensates for the last WORD yet to be stored
290 jmp StoswALandChecksumFromDL ; Bytes 14 and 15
291%endif ; MODULE_EBIOS
292
293
294;--------------------------------------------------------------------
295; StoswThenAddALandAHtoDL
296; Parameters:
297; AX: WORD to store
298; DL: Sum of bytes so far
299; ES:DI: Ptr to where to store AX
300; Returns:
301; DL: Sum of bytes so far
302; DI: Incremented by 2
303; Corrupts registers:
304; Nothing
305;--------------------------------------------------------------------
306StoswThenAddALandAHtoDL:
307 stosw
308 add dl, al
309 add dl, ah
310 ret
311
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